Ezra 7:10

For Ezra had prepared his heart to seek the law of the LORD, and to do it, and to teach in Israel statutes and judgments.

Ezra had prepared his heart to seek the law of the Lord ... His reigning desire had been to study the divine law, its principles, institutions, privileges, and requirements; and now, from love and zeal, he devoted himself, as the business of his life, to the work of instructing, reforming, and edifying others.